Patents by Inventor Darrell Robinson

Darrell Robinson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5944555
    Abstract: A watthour meter socket adapter electrically connects an external sealing ring and/or a metal cover ring on a watthour meter to ground. A surge ground conductor is mounted on an end mounting flange of the socket adapter housing and extends within and is joined to the housing by a first metal fastener. One end of the first metal fastener extends exteriorly of the housing and supports a first metal tab which is engaged by the metal sealing ring. A second metal fastener extends through the surge ground conductor and supports a second external tab engagable with a grounded meter socket cover. Alternately, a tab extends integrally from an upper end of the surge ground conductor for engagement with the sealing ring. In another embodiment, an annular surge ground conductor is mounted within an annular sidewall of a watthour meter socket adapter housing.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: August 31, 1999
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Robert O. Learmont
  • Patent number: 5853300
    Abstract: A watthour meter socket adapter 310 includes a plurality of current jaw contacts 290 and potential jaw contacts 10 mounted between front and rear housings 314, 312, with each jaw contact 290, 10 surrounding by a receptacle 422, 70 in the front housing 314. An aperture in each receptacle 422, 70 allows insertion of a meter blade terminal into the jaw contact. An electrical conductor extends from each jaw contact 290, 10 to an individual terminal 102 mounted in a terminal portion of the front and rear housings 314, 312. Apertures in the front housing 314 allow insertion of a tool into engagement with a fastener 112 carried on each terminal 290, 10 for fixedly joining a terminal clip 116 mounted a conductor 132 extending from the jaw contacts to an external conductor 138 inserted through openings in the bottom of the front and rear housings.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 29, 1998
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Robert O. Learmont, Karl R. Loehr, Allen V. Pruehs, Keith C. Dropiewski
  • Patent number: 5851038
    Abstract: A sealing ring for an electric watthour meter apparatus has first and second housings mounted on opposed ends of an annular band. A fastener extends through a threaded aperture in an end wall of one housing into threaded engagement with an aperture in an end wall of the opposed housing to fixedly engage the ends of the sealing ring. A plurality of radially intersecting slots in one end of the fastener are alignable with apertures in one of a plurality of side walls of one of the housings for receiving a security device. Screwdriver receiving slots are formed in each of the first and second ends of the fasteners. An axial slot is formed in the second end of the fastener and alignable with apertures in the side walls of the other housing for receiving a security device. An enlarged head end on the fastener enables finger rotation of the fastener. The end walls have an elongated upper end forming a finger grip surface to facilitate movement of the first and second housings toward each other.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: December 22, 1998
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Allen V. Pruehs
  • Patent number: 5762522
    Abstract: A fused jaw blade for use as a line or load jaw blade in a watthour meter socket adapter has a fuse body with a first lug extending from a first end and a second lug in the form of a blade terminal extending from an opposite second end. The second lug or blade terminal is adapted for releasable mounting in a watthour meter socket jaw contact. A jaw contact is formed with the first lug for receiving a blade terminal of a watthour meter or other electrical device therein. The jaw contact is formed by a pair of contact clips mounted on opposite sides of the first lug and having outer ends extending beyond the end of the first lug for receiving a blade terminal therein. Biasing springs are fixedly mounted to the contact clips. Alternately, a single contact clip is fixedly mounted on the first lug to form a complete jaw contact.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 9, 1998
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Allen V. Pruehs
  • Patent number: 5704804
    Abstract: A watthour meter socket adapter electrically connects an external sealing ring and/or a metal cover ring on a watthour meter to ground. A surge ground conductor is mounted on an end mounting flange of the socket adapter housing and extends within and is joined to the housing by a first metal fastener. One end of the first metal fastener extends exteriorly of the housing and supports a first metal tab which is engaged by the metal sealing ring. A second metal fastener extends through the surge ground conductor and supports a second external tab engagable with a grounded meter socket cover. Alternately, a tab extends integrally from an upper end of the surge ground conductor for engagement with the sealing ring. In another embodiment, an annular surge ground conductor is mounted within an annular sidewall of a watthour meter socket adapter housing.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: January 6, 1998
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Robert O. Learmont
  • Patent number: 5595506
    Abstract: A watthour meter socket adapter includes a plurality of rigid electrical conductors non-attachedly disposed in a housing. An electrical contact is mounted on a first end of each electrical conductor and is positioned within the housing for receiving a blade terminal of a watthour meter therein. A second end of each electrical conductor extends externally of the housing for insertion into terminals mounted in a watthour meter socket. An insulating sleeve mounted in the housing surrounds the portion of the electrical conductors extending externally of the housing, with the second ends of the electrical conductors extending outward from the sleeve. An electrically insulating plate is mounted within the housing spaced from a base of the housing. Apertures formed in the insulating plate receive individual electrical contacts on the conductors for positioning the electrical contacts and the electrical conductors within the housing to receive a blade terminal of a watthour meter.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: January 21, 1997
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Karl Loehr
  • Patent number: 5588874
    Abstract: A watthour meter adapter includes jaw contacts for receiving blade terminals of a plug-in watthour meter. Apertures formed in an annular side wall of the adapter housing receive external line and load conductors therethrough. A terminal block disposed within the annular side wall at a lower portion of the housing receives the external line and load conductors as well as internal electrical conductors connected at opposite ends to the jaw contacts. A slot formed in a bottom wall of the housing receives a fastener to mount the housing to an external support surface. The terminal block and terminal connections as well as the mounting fastener are completely contained within and covered by a watthour meter when a watthour meter is mounted on the adapter.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: December 31, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: Allen V. Pruehs, Darrell Robinson, Robert O. Learmont
  • Patent number: 5590179
    Abstract: Instantaneous current and voltage values are digitized at each of a plurality of electrical utility customer sites and integrated by a processor to calculate electrical power consumed at each customer site. A communication interface couples the processor at each customer site to a central processor in a central utility site to communicate the power consumed values of each customer site to the central utility site. In a preferred embodiment, the automatic meter reader apparatus is mounted in an electrical watthour meter socket adapter which plugs into a watthour meter socket at each customer site. Telephone modem circuitry mounted in the socket adapter connects to telephone lines to communicate calculated power values from each customer site to the central utility site.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: December 31, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: John T. Shincovich, Jan K. Michalek, Norman C. Baldwin, Ebrahim Shahrodi, Darrell Robinson, Allen V. Pruehs, Robert O. Learmont
  • Patent number: 5586913
    Abstract: A watthour meter socket adapter includes a plurality of rigid electrical conductors non-attachedly disposed in a housing. An electrical contact is mounted on a first end of each electrical conductor and is positioned within the housing for receiving a blade terminal of a watthour meter therein. A second end of each electrical conductor extends externally of the housing for insertion into terminals mounted in a watthour meter socket. An insulating sleeve mounted in the housing surrounds the portion of the electrical conductors extending externally of the housing, with the second ends of the electrical conductors extending outward from the sleeve. An electrically insulating plate is mounted within the housing spaced from a base of the housing. Apertures formed in the insulating plate receive individual electrical contacts on the conductors for positioning the electrical contacts and the electrical conductors within the housing to receive a blade terminal of a watthour meter.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: December 24, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Karl Loehr, Allen V. Pruehs, Robert O. Learmont
  • Patent number: 5577933
    Abstract: A watthour meter mounting apparatus, such as a socket, socket adapter and the like, has a safety shield completely enclosing the jaw contacts of the apparatus. Slots are formed in the safety shield to allow the insertion of a watthour meter blade terminal therethrough into connection with the jaw contacts. In one embodiment, a socket adapter housing includes front and back plates which are joined together and form a cavity therebetween in which the jaw terminals and the electrical conductors are disposed. Raised receptacles formed in the first plate loosely receive the jaw contacts mounted on one end of the conductors. In another embodiment, an insulating housing is mounted over the jaw contacts in a socket or socket adapter, with slots formed in the housing to allow the insertion of a watthour meter blade terminal therethrough into a jaw contact disposed within the housing.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: November 26, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Robert O. Learmont, Karl R. Loehr, Robert Goozen, Michael E. Lewis, Allen V. Pruehs
  • Patent number: 5572396
    Abstract: A socket adapter housing has a plurality of line and load blade terminals and jaw contacts. An electrical power disconnect device, mounted in the housing, has contacts switchable between closed and open states, the contacts being serially connected between the line blade terminals and the line jaw contacts. Rigid bus bars are fixedly connected to terminals on the power disconnect device extending from the switchable contacts and to the line blade and line jaws to fixedly mount the power disconnect device in the socket adapter housing. Surge suppression devices are connected between the load blade terminals and ground potential. An insulating safety shield is mounted in the housing and completely surrounds the line and load jaw contacts. Alternately, the housing includes a watthour meter receiving portion containing the power disconnect means and the line and load blade terminals and jaw contacts.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: November 5, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventor: Darrell Robinson
  • Patent number: 5571031
    Abstract: A watthour meter mounting apparatus, such as a socket, socket adapter and the like, has a flash shield completely enclosing the jaw contacts of the apparatus. Slots are formed in the flash shield to allow the insertion of a watthour meter blade terminal therethrough into connection with the jaw contacts. In one embodiment, a socket adapter housing includes front and back plates which are joined together and form a cavity therebetween in which the jaw terminals and the electrical conductors are disposed. Raised receptacles formed in the first plate loosely receive the jaw contacts mounted on one end of the conductors. In another embodiment, an insulating housing is mounted over the jaw contacts in a socket or socket adapter, with slots formed in the housing to allow the insertion of a watthour meter blade terminal therethrough into a jaw contact disposed within the housing.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: November 5, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Robert O. Learmont, Karl R. Loehr, Robert Goozen, Michael E. Lewis, Allen V. Pruehs
  • Patent number: 5546269
    Abstract: A housing includes a base with blade terminals insertable into jaw contacts in an electrical watthour meter socket. First and second watthour meter receiving shells are mounted on the housing, each having a pair of line jaw contacts connected in parallel to each other and to line blade terminals in the base. Electrical conductors extend from the load jaw contacts in one of the shells to a junction box mounted on the housing to provide a connection to an external electrical conductor. An electrical power disconnect device is mounted in one of the shells, and is connected in series by conductors between the line jaw contacts in both shells. The power disconnect device includes a movable external member having an end portion which slidably extends through the side wall of one of the shells. In one embodiment, the end portion is a separate rod which is biased into contact with the movable member.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: August 13, 1996
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Allen V. Pruehs, John Williams
  • Patent number: 5423695
    Abstract: A hardened metallic ring is mounted over the exterior sidewall of the shell portion of a watthour meter socket adapter. The ring has overlapped ends which are welded together to form a circular ring with a diameter approximate the diameter of the shell. In another embodiment, a radially outward flange is formed on one annular edge of the ring to cover a peripheral edge flange of the base of the socket adapter.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: June 13, 1995
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, John T. Shincovich, Michael E. Lewis
  • Patent number: 5385486
    Abstract: A watthour meter socket adapter includes at least one additional jaw terminal for receiving one blade terminal of a plurality of blade terminals of a watthour meter, which blade terminals are provided in a greater number than the available jaw terminals in a watthour meter socket which normally receive the line and load blade terminals of the watthour meter. The additional blade terminal extends through and outward from the watthour meter socket adapter housing. An electrical connector is mounted on the additional blade terminal externally of the watthour meter socket adapter housing for electrically receiving an electrical conductor in the socket adapter not normally connected to the line and load jaw and blade terminals in the socket adapter. A jumper is disposed within the watthour meter socket adapter housing and extends between selected additional jaw and blade terminals in the watthour meter socket adapter.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: January 31, 1995
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, Michael E. Lewis, Karl R. Loehr, Allen V. Pruchs
  • Patent number: 5361026
    Abstract: A load indicating socket tester includes a base and an annular sidewall. A plurality of pairs of line and load terminals are mounted in and extend outward from the base for removable insertion into electrical contact with jaw terminals in a watthour meter socket. A cover closes an open end of the side wall of the housing and has fuses, lamps, an amp meter, and a lamp test switch mounted thereon. The fuses and lamps are preferably provided in pairs and electrically connected with the lamp test switch such that the switch, when in a first position, connects each lamp in parallel with one of the fuses and, when in a second position, electrically connects each lamp in series with one of the fuses to test the operation of each lamp. A current transformer is mounted within the housing and detects the current drawn by a load when the socket tester is mounted in a watthour meter socket.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: November 1, 1994
    Assignee: Ekstrom Industries, Inc.
    Inventors: Allen V. Pruehs, Darrell A. Robinson
  • Patent number: 5207595
    Abstract: A terminal cover removably mountable on a watthour meter socket adapter includes an arm having an outwardly extending flange which is disposed in proximity with a sealing ring when the sealing ring is disposed about the mating mounting flange of a watthour meter and the rim of the socket adapter to lockingly mount the terminal cover on the socket adapter via the lock device carried by the sealing ring. In one embodiment, the flange on the arm has a predetermined length to engage a notch in the sealing ring to prevent rotation of the sealing ring. In another embodiment, the length of the flange on the arm is selected such that the flange lies between the sealing ring and the socket adapter housing to lockingly retain the terminal cover on the socket adapter housing when the sealing ring is locked about the mounting flange of the watthour meter and the rim of the socket adapter.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: May 4, 1993
    Assignee: Ekstrom Industries, Inc.
    Inventors: Robert O. Learmont, Darrell A. Robinson, Albert K. Langdon, Allen V. Pruehs, Robert Goozen
  • Patent number: 5033973
    Abstract: A service disconnect adapter mounted between a plug-in meter socket and a watthour meter. The service disconnect adapter has blades mounted on a base which engage terminals in the socket. Watthour blade receiving fingers are formed in the service disconnect adapter to receive and frictionally engage watthour meter blades. The service disconnect adapter electrically isolates the socket load terminals from the watthour meter blades to disconnect the watthour meter from the load side terminals of the socket. The blades are angularly offset from the watthour meter blade receiving fingers in the adapter to mount the watthour meter at an angle from its normal mounting position.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: July 23, 1991
    Assignee: Ekstrom Industries, Inc.
    Inventors: Allen V. Pruehs, Darrell Robinson, Robert O. Learmont, Robert Goozen, Michael Lewis
  • Patent number: 5006076
    Abstract: A cover for an electric meter socket has a planar base and a plurality of blades extending from one surface of the base for releasable engagement with the jaw terminals in the meter socket. Ribs are connected between the base and the blades to support the blades from sideways movement. One rib on at least one and, preferably, all of the blades has an extendable height so as to contact a jaw terminal in the meter socket when the cover is mounted in the meter socket to prevent deflection and movement of the cover with respect to the meter socket.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: April 9, 1991
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell Robinson, John T. Shincovich
  • Patent number: D349686
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: August 16, 1994
    Assignee: Ekstrom Industries, Inc.
    Inventors: Darrell A. Robinson, Allen V. Pruehs